BEYOND in Your Neighborhood — Habitat for Humanity — Santa Maria site, West Santa Maria Street and South Calle Pinta. An urban hike along the west side of the Sunnyside neighborhood. 8 a.m.-noon. 326-1217, Ext. 219.

Buffelgrass and Brew: A BEYOND celebration at “A” Mountain — “A” Mountain, 1000 S. Sentinel Peak Road. Help remove this invasive species that threatens to destroy public lands. Volunteers provided with the tools and free water and lunch. Go to beyond-tucson.org to sign up to volunteer. Buffelgrass pull from 8 a.m. to noon. Take a hike on the new trails at Sentinel Peak Park from 8 a.m. to sunset. Samples from Sentinel Peak Brewing Co. (for those age 21 and above) from noon to 1:30 p.m. 837-4263.

Hike BEYOND at Sabino Canyon, Coronado National Forest — Sabino Canyon Recreation Area, 5700 N. Sabino Canyon Road. A Junior Ranger Program at 9 a.m. The Sabino Canyon Volunteer Naturalists and Santa Catalina Volunteer Patrol will lead nature hikes at 9, 10 and 11 a.m. Also, an art station where children can paint their experience of the canyon. Arizona Game and Fish will host an interactive wildlife table and Smokey Bear will make an appearance. 8 a.m.-2 p.m. 749-7705.

BEYOND: Oro Valley Hikes in Rememberance — Catalina State Park, 11570 N. Oracle Road. Meet at 8:30 a.m. in the Chase Bank parking lot, across from the entrance to the park, and receive a wristband for discounted admission. Two choices of hiking distances: the Canyon Loop trail, three-mile loop; and Southerland Trail to Southerland Wash, 5.2 miles round trip. Hikers also may meet at trailhead at 9 a.m. 229-5050.

Five-Mile Social Run — Saguaro National Park West, 2700 N. Kinney Road. Run will not be officially timed, and there will be no awards or posted results, but participants must register at azroadrunners.org. Limited to 400 participants. Strollers are allowed, but route is sandy; oversized wheels are recommended. Presented by the National Park Service and the Southern Arizona Roadrunners. 8:30-10:30 a.m. 990-7938.

Day of Discovery in Colossal Cave Mountain Park — 16721 E. Old Spanish Trail, Vail. Discovery Tours. At 11 a.m. and 2 p.m., a free guided walk on the Path of the Ancestors Archaeology Trail, an easy one-mile walk through lands that were inhabited by the Hohokam Indians. Also, hands-on activities. 11 a.m.-3 p.m. park use fee for up to six people. 647-7275.

Gabe Zimmerman Davidson Canyon Trailhead Hike/Ride — 16000 E. Marsh Station Road, Vail. Hike or bike for a few hours, then meet back at the trailhead for refreshments. Activities along the way. 9:30 a.m.-noon. 404-7992.